Spike Jonze Director, Screenwriter Catherine Keener Mom Actor Max Records Max Actor Mark Ruffalo Boyfriend Actor James Gandolfini Carol Voice Lauren Ambrose KW Voice Chris Cooper Douglas Voice Catherine O'Hara Judith Voice Forest Whitaker Ira Voice Paul Dano Alexander Voice Dave Eggers Screenwriter Tom Hanks Producer Gary Goetzman Producer Maurice Sendak Producer John B. Carls Producer Vincent Landay Producer Thomas Tull Executive Producer Jon Jashni Executive Producer Bruce Berman Executive Producer Lance Acord Cinematographer Eric Zumbrunnen Film Editing Karen O Original Music Carter Burwell Original Music K.K. Barrett Production Design Lucinda Thomson Art Director Jeff Thorp Art Director Lisa Thompson Set Decoration Casey Storm Costume Design Justine Arteta Casting Kim Davis-Wagner Casting